Universities are like dictatorships where only staff has a vote on if the top executives should stay in their job. Since professors are tenured and are therefor

Universities are like dictatorships where only staff has a vote on if the top executives should stay in their job. Since professors are tenured and are therefore not beholden to anyone, the top executives are highly incentivised to increase the pool of voters that they have leverage over in order to create a stable coalition. This pool is administrative staff. This problem is further aggravated by the fact that students often choose Universities based upon reputation and are therefore rather insensitive to price increases, so extra spend on administrative staff is easy to find. In addition to this the government gives away student loans that matches rising tuition costs and because you can't get rid of student loans in bankruptcy it is an attractive asset class even for private lenders.